Fastener



Nov. 16 1926.

A. G. ANDERSON FASTENER Filed Jan. 22. -1924 CIN Patented Nev; ie, i926.

lisaiasi,

ANDREW ef. ANDERSON, or QUENCY, MASSACHUSETTS, Assrenon To oennres'rnnnnCoiuranr, or CAMBRIDGE, MASSACHUSETTS, A CORPORATION or ivinriinFASTENER.

Application flied January 22, i924'. semi No. 587,725.

This invention aims to provide an iinproved'fastener. v

Referring to the drawings, whichV show one illustrative einbodinient ofniy inventionf f' Figurel is a front Velevation of a pre-v ferred fornivof fastener;

' Fig.2 is a front elevation of the stud;

Fig. 3 is a section onthe'line 3 3 of Figl; y' i'.

Fig. 4 is a section on theline 1 4 of Fig. 1, being partly inelevationand showing the socket withdrawn from the stud; and f v Fig. 5is a Fig. 4." In vthe preferred forrn of iny invention selected forillustrative purposes, I have shown a socket attached toa curtain 5 byprongs 7 strucknp froin aback plate 9, which pass through the curtain toengage and `be clenched by a front plate 11. The back plate 9 presents astud-receiving aperture 13 having a continuous peripheral wall 111,which is resiliently pressedby vthe neck of the stud when the stud andsocket are engaged. This wall is preferably,'as illus trat-ed,substantially th'ickerthan the metal of which the back plate is formed,thereby to provide a substantial bearing surface.

' The stud includes a neck 15 and a head 17 struck up from a plate 19,the head Iliade unsyinrnetrically contractible and eXpansible sectionon` the line 5 5 of lby slots 21, 21, extending to the base of the` studand preferably, as illustrated, extending sufficiently into the basesothat a line between their ends will notpassthrough any j portion ofthe stud which projects from the base. The stud illustrated isalsoreiidered slightly contractible and .eXpansible later-y ally by theprovision of a third slot 27, connected to the slots 21, 21 at the outerend of the stud, but extending .a substantially less distance toward thebase. preferably not eX- ;a tending to the neck portion of the stud and'terminating, as illustrated, adjacentthe edge ofthe outer face of thestud.

The stud illustrated thus provides twoy parts, an upper, or semi-rigidpart 23, slightly collapsible laterally, anda bottoni resilient portion20, the latter preferably as above described ad-apted to flex about aflat portion of the base lying between the ends of theslots 21, 21. Asviewed in Fig. 2, the so-called upper part 23 includes all kof theprojecting portion ofthe stud between the two slots 21, 21 in which theslot 27 isprovided, andV the so-called bottoni portion 20 includes theremaining projecting portion of tl'ie stud between the slots 21,21 orthe sinall portion of the stud.. j The projectingpporf tion of the studis kpreferably substantially round in cross-section at tlie'liead, andat the neck, but the circleprovi'ded by the` head' isA preferablyeccentric relative to the vcircle provided by the neck, the eccentricityof the head relative to the neck being awayfrorn that side of the studwhich provides the resilient portion 21.7. Thus in the preferred side oftliestudopposite Vthe 'resilient portion 21, this shoulder gradually.growing less at tliesides of the 'stud and substantially disappearing'at that side of thestud presenting theV resilient vportion 21. t

TWhen the stud and socket are engaged, they are locked againstseparationby any vstrain other than a separating pull at the side presenting theresilientportionofthe stud becausev the upper part 23 ofthe head is notresilient enough to permit the wall `of the aperture '13 to pass overthe shoulder 25, `and because any reasonableoutward strain at eitherYside of the studati'orabove the Acenter thereof cannot producesufficient contraction of the stud to permitthe socket or eyelet to passover the head of `the stud.v

Thus I have .provided a rthree-side lock fastener which is locked'against. separation by a pull adjacent the three sides ofthe Ystud atwhich the shoulder 25 is provided,

by a tipping action. In a co-pending application, filed herewith, T haveshown a somewhat siinilar construction wherein the stud, instead of thesocket, isinounted on the curtain. f The claiins of the present ap-yplication are either generic to both forms ion vLio

receiving aperture, a stud having a head and a-neck, said head being ofsubstantially 'the Isame contour as the-wall surrounding thestud-receiving aperture thereby to per- Amit engagement of said studwith said sockyet by direct axial movement of one toward the other, arelatively short slot formed entirely in the outer end of'said head toprovidea semi-rigid portion, a shoulder located upon said semi-rigidportion between said head and .said neck to prevent separation of saidlstud from said socket by relative tipping movement between said studand socket at that side of said stud and a resilient portion locatedopposite one end of said slot.

2. A stud and socket fastener comprising,

vin combination, a socket presenting a studreceiving aperture, a studhaving a head.

and a neck, a relatively short slot located entirely in the upper end ofsaid head to permit slight contraction of the upper portion of saidhead, a continuous shoulder located upon said upper portion between saidY head and. said neck to prevent separation of said stud from Isaidsocket by relative tipping movement between said stud and said socket atthree sides of said stud, and a plurality of generally radially disposedslots connected with said first nam-ed slot, said slots extending to thebase ofthe stud to provide a contractible and expansible part at thebottom of said stud whereby to permit separation of said stud from thesocket by relative tipping movement between .said stud and socket when apull is exerted adjacent the bottom of the stud.

3. Astud for separable fasteners comprising a head, a neck, a shoulderpartly surrounding said stud between said head and neck, and a base,said head having a short substantial width resiliently connected to thebase of the stud and independent of the upper portion for substantialyieldable engagement with asocket.l Y Y 5. A stud for three-side lockfasteners including a head, a neck and a base portion. said head andneck divided by asingle 'relatively short slot located entirely in thehead fr' of the stud and a plurality of longer slots diveroing from oneend of said short slot to provide a semi-rigid portion and a resilientportion,` the semi-rigid portion providing the top and sides of the studand the resilient portion providing the bottom ,of the stud, the slotsproviding said resilient portion extending from the head a substantialdistance into said base ,to permit said resilient portion to yield atthe `junction thereof between the neck and the base of the stud, saidhead beingeccentric relativeto said neck to provide a Ishoulder on-said.semirigid portion between said head and said neck, said'shoulder beingsubstantially` less pronounced at the sides than at the top of saidstud.

6. A stud for a three-side lock fastener comprising a head, a neck and abase portion, said head and neck being divided by a plurality of slitsinto a substantially iniieX- ible shoulder portion forlocking said studVwith the socket against separation at at least one side thereof and afreely contractible and eXpansible portion to permit separation of thestud from the socket by a pull adjacent the contractible and eXpansibleportion, at least two of said slits intersecting in the head andterminating at Vpoints below a horizontal plane passing through thecenter of the stud.

In testimony whereof, name to this specification.

ANDREW G. ANDnRsoN.

I have signed my

